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SRU Installation

17286-1000 Rev..B 03/14/01

SRU Inst alla tion Manual

2-1

2. Subscriber Radio Unit Installation......................................................................... 2-1

2.1 Introduction................................................................................................................................... 2-1

2.2 Getting Ready for Installation ....................................................................................................... 2-1

2.2.1 Subscriber Radio Component ............................................................................................... 2-2

2.2.2 Grounding Recommendations................................................................................................ 2-3

2.2.3 Lightning Protection .............................................................................................................. 2-4

2.2.4 Mounting Specifications........................................................................................................ 2-4

2.2.5 Wind Loading Requirements................................................................................................. 2-4

2.3 Outdoor Installation of SRU with Integral Antenna ....................................................................... 2-4

2.3.1 SRU Mounting Process ......................................................................................................... 2-5

2.3.2 Installing the Pole Mount....................................................................................................... 2-5

2.3.3 Installing a 26 GHz, 28 GHz, or 39 GHz SRU to a Pole ....................................................... 2-5

2.3.4 Installing the 10 GHz SRU Mount ......................................................................................... 2-8

2.3.5 Universal Mount.................................................................................................................... 2-8

2.3.6 Installing the 10 GHz SRU.................................................................................................. 2-10

2.3.7 Latin American 10 GHz Frequency Plan............................................................................. 2-10

2.4 Outdoor Installation of SRU with Non-Integral Antenna ............................................................. 2-12

2.4.1 Installing the Radio Unit & Antenna.................................................................................... 2-12

2.4.2 Pre-installation Preparation of the Antenna and Radio Assemblies .................................... 2-13

2.4.3 Installing with the Correct Polarization............................................................................... 2-15

2.4.4 Installing the Mount............................................................................................................. 2-17

2.5 Installation of Coaxial Cable ...................................................................................................... 2-18

2.5.1 Connect SRU Coaxial Cable............................................................................................... 2-18

Subscriber Radio U nit

Installation

2.1

Introduc tion

This chapter gives instructions for installation of a Subscriber Radio Unit (SRU).

Before installing the Subscriber Radio Unit, perform the following steps:

Refer to “SAS Installation Manual” and perform the indicated procedures.

Install the Base Station as explained in “BSIS Installation Manual.”

Verify line of sight between the BRU and the SRU.

2.2

Gett ing Rea dy for Inst allat ion

Before proceeding, remove and save all documentation. Use this manual for the installation

of the Subscriber Radio Unit.

Summary of content (18 pages)

PAGE 1
SRU I nst allat ion 2. Subscriber Radio Unit Installation......................................................................... 2-1 2.1 Introduction................................................................................................................................... 2-1 2.2 Getting Ready for Installation ....................................................................................................... 2-1 2.2.1 Subscriber Radio Component ...............................................
PAGE 2
SRU I nst allat ion To prevent any damage to the components, carefully unpack the units on a flat, clean surface at the installation site. If a component must be unpacked at another location, carefully repack it in the original container before moving it to the installation site. Inspect components carefully for any damage. Damaged equipment should be reported immediately to Netro and the shipping provider. 2.2.1 Subscriber Radio Component The SRU is installed outdoors and mounted to a pole.
PAGE 3
SRU I nst allat ion • TNC Male to TNC Female right angle adaptor Lightning arrestors (not part of Netro equipment or installation) G round wire (not part of Netro equipment or installation) 2 .2 .1 .2 Coa x ia l Ca ble A coaxial cable is used for the connection between the Subscriber Access System (SAS) and the Subscriber Radio Unit (SRU). Use only coaxial cable meeting the specification. An undamaged, unconnected coaxial cable should have a very high resistance between center and ground.
PAGE 4
SRU I nst allat ion • • Cable - G round the cable at building entry and use lightning arrestors at the antenna and the indoor equipment. Subscriber Radio Unit (SRU) - G round the SRU to the rooftop lightning grid via the lug in the enclosure. Use heavy gauge wire (10AWG ). 2.2.3 Lightning Protection A lightning arrestor is recommended for all SRU installations (not part of the Netro equipment or installation). You should also fit suitable lightning protection to the signal cabling. 2.2.
PAGE 5
SRU I nst allat ion 2.3.1 SRU Mounting Process The SRU can be mounted on a pole. When the SRU is installed onto a pole, first a pole mount (consisting of a mounting plate and a strap) is installed onto the pole. The pole mount is the same for the 26 G Hz, 28 G Hz, 39 G Hz, and 10 G Hz SRUs. The appropriate SRU mount is then affixed to the pole mount. The 26 G Hz, 28 G Hz, and 39 G Hz SRUs use the same SRU mount. The 10 G Hz SRU uses a different SRU mount. The SRU is then affixed to the SRU mount. 2.3.
PAGE 6
SRU I nst allat ion Mounting Plate M10 Bolt SRU Mount NTR98-53a Figure 2-1 Installing 26 G Hz, 28 G Hz, 39 G Hz SRU Mount 5. Install the SRU into the Yoke as follows: a) Position the SRU as shown in Figure 2-2 b) Slide the SRU into the mounting Yoke, as shown in E rror! Reference source not found.. The elevation stud with the nut washer attached should drop into the slots on the mounting yoke.
PAGE 7
SRU I nst allat ion Yoke SRU Elevation Stud with Lock Nut/Washer NTR98-54a Figure 2-2 Installing 26GHz, 28 GHz, or 39 GHz SRU into Yoke 6. Once the SRU is inside the yoke (as shown in E rror! Reference source not found.) rotate it so that the antenna is at the top (as shown in Figure 2-3). Figure 2-3 SRU Azimuth and Elevation Adjustment 7. Follow the steps outlined in Chapter 1 to align the SRU with the BRU. 17286-1000 Rev.
PAGE 8
SRU I nst allat ion 2.3.4 Installing the 10 GHz SRU Mount Install the 10 G Hz SRU mount onto the mounting plate as follows: 1. Put anti-seize compound on 25mm bolts and start them into the holes, leaving about ¼ inch space on the bolts for the 10 G Hz SRU mounting. 2. Slide the 10 G Hz SRU mount over (3) bolt heads, and then slide it down so the bolts are within the small part of the mounting holes. M10 Mounting Holes NTR98-1017 Figure 2-4 Reverse of 10 GHz SRU Mount 3.
PAGE 9
SRU I nst allat ion 17286-1000 Rev.
PAGE 10
SRU I nst allat ion 2.3.6 Installing the 10 GHz SRU The 10 G Hz SRU may be installed with either vertical or horizontal polarization. A label on the reverse of the SRU specifies its orientation for vertical or horizontal polarization, and the polarization is noted in the illustrations. A rotation of 180 degrees will maintain the polarization; a rotation of 90 degrees will change it.
PAGE 11
SRU I nst allat ion 9 10213.7 10563.7 9 10277.16667 10627.16667 10 10221.16667 10571.16667 10 10292.1 10642.1 11 10228.63333 10578.63333 12 10236.1 10586.1 13 10243.56667 10593.56667 14 10251.03333 10601.03333 15 10258.5 10608.5 16 10265.96667 10615.96667 17 10273.43333 10623.43333 18 10280.9 10630.9 19 10288.36667 10638.36667 20 10295.83333 10645.83333 NOTE: The frequencies listed above are the exact transmit/receive frequencies.
PAGE 12
SRU I nst allat ion 2 .4 Out door I nst a llat ion of SRU w it h N on-I nt e gra l Ant e nna The high-performance, non-integral antenna version of the radio unit consists of a parabolic antenna, shroud and radome. The feed assembly has rectangular waveguide. Two sizes of antennae are available, 0.3 m or 0.6 m. 2.4.1 Installing the Radio Unit & Antenna 2 .4 .1 .
PAGE 13
SRU I nst allat ion Figure 2-10 Wall Mount Figure 2-11 Tripod Mount When selecting a physical location, ensure that there is enough room to swing (pan) the antenna during antenna alignment and that all the adjustable hardware is accessible. The mounting location of the radio/antenna assembly on the pole mount as well as the routing of the coaxial interface cable should be decided upon in advance. All the mounts will accommodate a maximum pole diameter of 115mm [4.5 inches] with the supplied V-clamp bolts.
PAGE 14
SRU I nst allat ion 5. Black plugs cover small drain holes in the antenna reflector. Determine the orientation of the antenna on the pole then remove the plug from the hole at the bottom of the reflector. 6. If the SlimLine is horizontally polarized, connect the 90° TNC adapter supplied with the radio to the TNC connector on the radio. This adapter is required to provide the necessary clearance to route the coaxial interface cable between the radio and the mount.
PAGE 15
SRU I nst allat ion Netro SlimLine Radio Unit Outside View Vertical Polarization Lifting Handles (both sides) Horizontal Polarizaton Netro SlimLine Radio Unit Antenna Connection View Vertical Polarization Waveguide in Vertical Polarization Position (antenna default) Lifting Handles (both sides) TNC Connector Wrap TNC Connector and Radio Cable Junction with Self-Amalgamating Weatherproof Sealing Tape NTR98-34 Figure 2-12 SlimLine Radio Waveguide Polarization 2.4.
PAGE 16
SRU I nst allat ion 2 .4 .3 .1 Adjust ing t he Ant e nna ’s Wa ve guide Posit ion 1. Remove the red cap from the antenna feed. Figure 2-13 shows the position of the antenna feed as shipped with vertical polarization. 2. Using the Allen key provided, remove and save the 4 Allen bolts from the antenna chassis near the center of the antenna. 3. G rasp the stainless steel antenna feed and rotate it one-quarter turn (90º).
PAGE 17
SRU I nst allat ion 2.4.4 Installing the Mount The following instructions provide details on two typical installation scenarios. 2 .4 .4 .1 Dire c t Asse m bly a t Fina l M ount ing Posit ion When access to the mounting pole is unobstructed and at a comfortable working height, use the following procedure: Install the antenna pole mount as shown in the relevant installation drawing using the V-clamps and associated hardware (see Figure 2-14). Figure 2-14 Installing the Non-Integral Antenna Pole Mount 1.
PAGE 18
SRU I nst allat ion 2 .5 I nst a llat ion of Coa x ia l Ca ble A coaxial cable connects the SAS to the SRU. The cable generally must pass from an indoor location of the SAS to an outdoor location of the SRU. When installing the cable, consult local regulatory authorities and follow all local building codes. When laying out the coaxial cable, include enough cable for a service loop of at least 18 inches (0.5 m) at the SRU. When the main cable is LMR400, remember to use a 12-inch (0.